In northeastern Indiana, septic system failure has led to new state legislation and a soil hydraulic conductivity investigation on a series of concentric moraines formed from the Erie-Ontario lobe (Wisconsin glaciation). The objective of this study was to evaluate the soil hydraulic conductivity (K_sat) across an Epiaqualf - Argiaquoll toposequence on the Wabash moraine. Soil particle size analysis and hydraulic conductivity at the summit, shoulder, backslope, footslope, and toeslope were determined. Clay content ranged from 24-34 % in the Ap horizons, 34-45 % in the Bt horizons, 26-50 % in the BC horizons, and 26-52 % in the Cd horizons. The Ap horizons had the highest K_sat at all hillslope positions (3.66 x 10^-7 - 6.47 x 10^-6 m s^-1). At the summit, shoulder, backslope, and footslope positions, the Bt horizons had the lowest K_sat (6.11 x 10^-9 – 2.14 x 10^-8 m s^-1); while at the toeslope position the lowest K_sat was in the BC horizon (1.44 x 10^-8 m s^-1). There were no significant K_sat differences between Ap horizons of all hillslope positions. Hydraulic conductivity of the Bt, BC, and Cd horizons in the summit and shoulder positions was significantly different from the K_sat of the Bt, BC, and Cd horizons in the footslope and toeslope positions. The K_sat of backslope horizons was not significantly different from other hillslope positions. Within this study area, we found that below the Ap horizon, topography plays an important role in septic system performance.